01071nam a2200229Ia 450000100070000000500170000700800410002404000100006524501320007524600640020724600220027126001460029330000470043949000590048650400510054565000530059665000420064965000480069165100340073970000300077371000380080325276420200623182840.00110  e1999    vauab  frb    001 0 eng d  aPUCPR00aLava Falls Rapid in Grand Canyonbeffects of late Holocene debris flows on the Colorado Rivercby Robert H. Webb ... [et al.]. 30aEffects of late Holocene debris flows on the Colorado River18aLava Falls Rapid   aReston, Va.bU.S. Dept. of the Interior, U.S. Geological SurveyaDenver, CObFor sale by U.S. Geological Survey, Information Servicesc1999.   avi, 90 p.bill., maps (some col.)c28 cm.  0aU.S. Geological Survey professional paperv15912Local  aIncludes bibliographical references and index. 0aDebris avalancheszArizonazGrand Canyon.2Local 0aRapidszArizonazGrand Canyon.2Local 0aGeology, StratigraphicyHolocene.   2Local 0aLava Falls Rapid Ariz.2Local1 aWebb, Robert H.   2Local  aGeological Survey (U.S.)  2Local